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i2c: Use put_user instead of copy_to_user where possible
This speeds up the I2C_FUNCS ioctl by 5 to 8% in my tests. Signed-off-by: Jean Delvare <khali@linux-fr.org> Laughed-at-by: Mark M. Hoffman <mhoffman@lightlink.com>
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@ -193,8 +193,7 @@ static int i2cdev_ioctl(struct inode *inode, struct file *file,
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return 0;
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case I2C_FUNCS:
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funcs = i2c_get_functionality(client->adapter);
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return (copy_to_user((unsigned long __user *)arg, &funcs,
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sizeof(unsigned long)))?-EFAULT:0;
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return put_user(funcs, (unsigned long __user *)arg);
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case I2C_RDWR:
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if (copy_from_user(&rdwr_arg,
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